What is the primary difference between full virtualization and para-virtualization?

The primary difference between full virtualization and para-virtualization lies in the awareness of the guest operating systems. In full virtualization, the guest OS is completely unaware that it is running in a virtualized environment. The hypervisor emulates the underlying hardware, allowing any operating system to run without modification. In contrast, para-virtualization requires the guest OS to be modified so that it can communicate directly with the hypervisor, making it aware of the virtualization layer. This awareness allows para-virtualization to achieve better performance through optimized interaction with the hypervisor, but it also means that not all operating systems can be used without modification. Examples of full virtualization include VMware Workstation and KVM, while para-virtualization is exemplified by Xen. Why Other Options are Wrong: A) Both types of virtualization require a hypervisor; the difference is in how the guest OS interacts with it. C) Para-virtualization can provide better performance under certain conditions due to reduced overhead. D) Para-virtualization often uses fewer resources due to optimized performance rather than requiring more. E) Full virtualization is not limited to Linux; it supports a wide range of operating systems.